Two-walled cap for container of granular material with sifter closure mounted between said two walls for rotation about longitudinal container axis



May 22, 1951 c. H. KOEPPEL 2,554,444

TWO-WALLED CAP FOR CONTAINER 0F GRANULAR MATERIAL WITH SIFTER CLOSURE MOUNTED BETWEEN SAID TWO WALLS FOR ROTATION ABOUT LONGITUDINAL CONTAINER AXIS Filed March 6, 1947 ZNVENTOR. Charles H.Koeppel Patented May 22, 1951 TWO-WALLED CAP FOR CONTAINER OF GRANULAR, MATERIAL WITH SIFTER CLOSURE MOUNTED BETWEEN SAID TWO WALLS FOR ROTATION ABOUT LONGI- TUDINAL CONTAINER AXIS Charles H. Koeppel, North Woodbury, Conn, as-

signor to Soovill Manufacturing Company,

Waterbury, Conn., a corporation of Connecticut Application March 6, 1947, Serial No. 732,743

Claims. 1 i

This invention relates to sifter tops for containers such as used for pulverulent material of the character of talcum powder or the like.

One of the objects of this invention is to produce a sifter top container of highly ornamental appearance in which the various parts are assembled together without resorting to mechanical formations or distortion of any character such as would detract from the ornamental ap pearance of the outside cap, and at the same time devising a cap of the above character having features for making the device substantially leak-proof.

A further object is to provide a sifter top of the above character in which the main body part of the device is composed of two interfitted sheet metal shells and an axially rotatable closure member that may be made of a plastic ma terial, and wherein the closure member is so tensioned by cooperating parts of the shells as to afford a leak-proof seal between the movable surfaces of the closure member relative to the shells.

Another object is to design the shell parts of the device in such a manner that they may be adequately held together by a cementitious material rather than by a mechanically formed holding structure, and which material is preferably one of the air cured synthetic rubber cements.

Another object is to effect a leak-proof seal for the rotatable closure element by spraying a flock material upon one of the surfaces against which said closure element makes contact.

With these objects in view and others not specifically referred to, the invention consists of certain novel parts, arrangements and cornbinations which will be described in connection with the accompanying drawing and the novel features pointed out in the claims hereunto annexed.

In the drawings:

Fig. 1 is an enlarged vertical sectional view of the device taken along the line of Fig. 3.

Fig. 2 is a side elevational view of the dispensing sifter top shown in association with a container.

Fig. 3 is a top plan view of the same on the same scale as Fig. 1 with part broken away to show the interior construction, and

Fig. 4 is a bottom plan view, but showing the closure element rotated to closed position.

Referring now to the drawing in which like throughout the several views, the numeral ill refers generally to the combination closure device and sifter top that may be detachably secured to the neck Ila of a container H in a manner to be described later. The closure device, as best shown in Fig. 2, has the general appearance of a smooth cylindrical cap and entirely concealing the structural elements that are employed for making detachable connection with the container neck, and also devoid of all mechanical formations in the exposed portions 01 said cap that are conventionally employed as a holding means for the interior parts.

As best shown in Fig. 1 the closure device It comprises two interfitted sheet metal cupped shells, an outside cup shaped cap shell i2 having a closed end It and a cylindrical skirt wall i l, and an interior attaching shell l5 having closed end It that is abutted against the closed end it of cap l2, and a cylindrical wall IT. The lower end of wall I! is formed with an outward radial flange 28 that is integrally connected at its outer periphery to an upstanding wall or annulus IQ of a size adapted to have slidable telescopic engagement into the interior of the skirt wall i l from the open end of the cap shell [2. The flange 18, it is to be noted, is disposed rela tively close to the open end of the cap shell I2 to further enhance the general ornamental appearance of the closure cap I0, and also m'easurably add to the general strength of the entire closure device Ill.

The cylindrical wall I! is formed with an inwardly rolled thread 20 by means of which the cap if) has detachable engagement with the exterior threaded neck I la of the container II.

In designing the sifter top feature of the cap 20, provision is made of a relatively thick rotat able disc 2! with a lower peripheral flange 22. An operating handle 23 projects upwardly from the center of the disc 2|, and a projection 24 depends from the lower face of said disc 2| as a means of controlling the off and on positions of said disc as will more fully appear later.

lhe central area of the closed end 16 of the The rotatable disc 2| is provided with a series of uniformly spaced axial discharge apertures 29 that are adapted to align with a like number of piercings 39 provided in the base wall 26 of the central depression 25 when the operating disc 2| is located in open position. The control projection 24 projects downwardly through a wing shaped opening 3| pierced axially in the base 26 of the central depression 25 and when the disc 2| is rotated so that the control projection 24 is engaged against one set of diametrically opposite edges of the wing shaped opening 3|, the disc 21 will be stopped in a positive closed or off position such as shown in Fig. 4 with the discharge openings 29 of the disc 2% located substantially half way between the piercings 36 in the base wall 26. By turning the disc 23 in a clockwise direction'as viewed in Fig. 4 the control projection 24 will engage the other diametrical opposite edges of the wing shaped opening 3! in aligning the discharge openings 29 with the piercings 30 for open operating on position.

In order to provide for a leak-proof seal of a character to control the pulverulent material of the container 1 l as between the engaging surface or the disc 2i and the central depression 25 of the inside shell l5, this is accomplished by first.

coating the upper and inner surfaces of the base wall 25 and depending wall 25a respectively with a suitable adhesive and then spraying a. flock material thereupon to build up to a felt-like surface 32 is clearly shown by the interposed material in Fig. 1.

In the assembly of the device after the flock surface 32 is built up as explained above, the operating disc it is nested within the central depression 25 of the inside shell 15. Just prior to the assembly of the inside shell into the outside cap 2, a coating of adhesive or cement material 33 is applied to the inner surface of the skirt wall H3 adjacent the open end thereof. The two shells l2 and I5 are then aligned and telescoped together with the upstanding wall 19 snugly fitting within the skirt wall it with the adhesive material interposed therebetween as a bonding agent. In the choice of a suitable bonding material preference is given to one of the air cured synthetic rubber agents. In the telescopic engagement of the two shells l2 and it a certain amount of the bonding material 33 will perforce be scraped on and accumulated against the innermost free edge or" the upstanding wall It to provide for a fillet of bonding material 34 as an additional binding agent.

In the use of an air cured bonding material 33, in order to accelerate the curing of the fillet 34 and interposed film of cement 33, there are provided one or more vent openings 35 in the wall H of the inside shell and thus allow for a free circulation of air into the hollow space defined between the shells l2 and 45 that would otherwise be a dead air space.

Another ieature of this invention is to provide an adequate tensional factor upon the operating disc 2i so that it will not be easily and accidentally opened after once manually moved to closed position. This is accomplished by controlling the dep 21 of the central depression 25 such that the distance between the base wall 26 and the overhanging flange 25 isslightly less than the thickness of the disc peripheral flange 22 and making due allowance for the built-up flock surface 32. Further the fact that the closed end it or the outsde cap i2 not rigidly secured to the closed end 23 of the inside shell 15 allows the overhanging flange 28 to resiliently give relative thereto and compensate for any irregularities or normal commercial tolerances that are permitted in the'manufacture of articles of this character without creating any exceptional binding factor upon the operating disc it such as would make it difiicult to operate.

The usual form of cork washer 36 is fitted within the insideshell l5 and seated against the base wall 25 of the depression 25 to effect a leak-proof seal with the end of the container neck I la.

While the invention has been shown and do scribed in its preferred form, it will be understood that various changes may be made in the particular shape and arrangement of parts without departing from the invention as defined in the appended claims.

I claim:

1. A sifter closure for detachable engagement with a container, said closure comprising an inner member and an outer shell member, both members having open ends and closed ends with their side walls spaced apart, said inner member having means for detachable connection with a container, means for permanently connecting the open ends of said members together, said closed ends of said members being normally abutted together, the closed end of said central member having a central recess with apertures in its base wall, the closed end of said outer shell member having a central opening of a size less than the diametrical size of said central recess to provide for an overhanging flange over said recess, a disc member fitted into said recess andhaving'discharge openings adapted to be aligned with said apertures, hnadle means on said disc member projecting through said central opening, said overhanging flange serving to hold said disc within said recess, the closed end of said outer shell member with its overhanging flange being capable of moving away from the closed end of said inner member due to the inherent resiliency of the material of said outer shell member to preclude any abnormal binding of said disc in its recess, and means to control the rotation of said disc in predetermined open and closed positions.

2. A sifter closure as defined by claim 1 where in the base surface and side wall of said inner member recess is coated with a ilock material as a means of providing a powder seal between said disc and the adjacent surfaces of said recess.

3. A sifter closure for detachable engagement with a container, said closure comprising inner and outer shell members, both members having closed ends and open ends with their side walls 1 spaced from each other and with their closed ends normally in abutted relationship, means for permanently connecting the open ends of said shell members together, the closed end of said inner shell member having a central depression the base of which is provided with one or more apertures, the closed end of said outer shell member having a central opening, a disc rotatably fitted into said central depression and having one or more discharge openings adapted to be aligned with said apertures, the size of the central opening of said outside shell member being less in size than the diametrical size of said central depression to provide for overhanging flange engaging said disc as a means for holding said disc in said central recess, said outer shell closed end and overhanging flange being free to move away from the closed end of said inner shell due to the inherent resiliency of the material of said outer shell to allow freedon of action for said disc regardless of any binding action that said disc may be subjected to, and means for controlling the rotation of said disc in predetermined open and closed positions.

4. A sifter closure as defined by claim 3 Wherein the inner shell member is provided with outwardly extended flange at its open end terminating in an upstanding cylindrical Wall having telescopic engagement with said outer shell member as a means for holding said shell members together.

5. A sifter closure as defined by claim 4 Wherein said upstanding wall is bonded to said outer shell member by an interposed film of synthetic rubber cement.

CHARLES H. KOEPPEL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

